Landmarks!

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Across
  1. 5. longest wall in the world
  2. 8. tall clock tower in London
  3. 10. natural landmark located in Arizona
Down
  1. 1. symbol of freedom in New York City
  2. 2. tall thin tower in Washington DC
  3. 3. tall structure in Italy tipping over
  4. 4. located in San Francisco, California
  5. 6. large tower located in Paris
  6. 7. tallest building in the world
  7. 9. partially fallen arena in Rome, Italy